3 # Copyright (c) 2019 Cisco and/or its affiliates.
4 # Licensed under the Apache License, Version 2.0 (the "License");
5 # you may not use this file except in compliance with the License.
6 # You may obtain a copy of the License at:
8 # http://www.apache.org/licenses/LICENSE-2.0
10 # Unless required by applicable law or agreed to in writing, software
11 # distributed under the License is distributed on an "AS IS" BASIS,
12 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 # See the License for the specific language governing permissions and
14 # limitations under the License.
16 """This module gets a traffic profile together with other parameters, reads
17 the profile and sends the traffic. At the end, it measures the packet loss and
27 0, u"/opt/trex-core-2.73/scripts/automation/trex_control_plane/interactive/"
29 from trex.stl.api import *
32 def fmt_latency(lat_min, lat_avg, lat_max, hdrh):
33 """Return formatted, rounded latency.
35 :param lat_min: Min latency
36 :param lat_avg: Average latency
37 :param lat_max: Max latency
38 :param hdrh: Base64 encoded compressed HDRHistogram object.
43 :return: Formatted and rounded output (hdrh unchanged) "min/avg/max/hdrh".
47 t_min = int(round(float(lat_min)))
51 t_avg = int(round(float(lat_avg)))
55 t_max = int(round(float(lat_max)))
59 return u"/".join(str(tmp) for tmp in (t_min, t_avg, t_max, hdrh))
63 profile_file, duration, framesize, rate, warmup_time, port_0, port_1,
64 latency, async_start=False, traffic_directions=2):
65 """Send traffic and measure packet loss and latency.
68 - reads the given traffic profile with streams,
69 - connects to the T-rex client,
71 - removes all existing streams,
72 - adds streams from the traffic profile to the ports,
73 - if the warm-up time is more than 0, sends the warm-up traffic, reads the
75 - clears the statistics from the client,
77 - waits for the defined time (or runs forever if async mode is defined),
79 - reads and displays the statistics and
80 - disconnects from the client.
82 :param profile_file: A python module with T-rex traffic profile.
83 :param framesize: Frame size.
84 :param duration: Duration of traffic run in seconds (-1=infinite).
85 :param rate: Traffic rate [percentage, pps, bps].
86 :param warmup_time: Traffic warm-up time in seconds, 0 = disable.
87 :param port_0: Port 0 on the traffic generator.
88 :param port_1: Port 1 on the traffic generator.
89 :param latency: With latency stats.
90 :param async_start: Start the traffic and exit.
91 :param traffic_directions: Bidirectional (2) or unidirectional (1) traffic.
92 :type profile_file: str
93 :type framesize: int or str
96 :type warmup_time: float
100 :type async_start: bool
101 :type traffic_directions: int
113 print(f"### Profile file:\n{profile_file}")
114 profile = STLProfile.load(
115 profile_file, direction=0, port_id=0, framesize=framesize
117 streams = profile.get_streams()
118 except STLError as err:
119 print(f"Error while loading profile '{profile_file}' {err!r}")
127 # Prepare our ports (the machine has 0 <--> 1 with static route):
128 client.reset(ports=[port_0, port_1])
129 client.remove_all_streams(ports=[port_0, port_1])
131 if u"macsrc" in profile_file:
132 client.set_port_attr(ports=[port_0, port_1], promiscuous=True)
133 if isinstance(framesize, int):
134 client.add_streams(streams[0], ports=[port_0])
135 if traffic_directions > 1:
136 client.add_streams(streams[1], ports=[port_1])
137 elif isinstance(framesize, str):
138 client.add_streams(streams[0:3], ports=[port_0])
139 if traffic_directions > 1:
140 client.add_streams(streams[3:6], ports=[port_1])
143 if isinstance(framesize, int):
144 client.add_streams(streams[2], ports=[port_0])
145 if traffic_directions > 1:
146 client.add_streams(streams[3], ports=[port_1])
147 elif isinstance(framesize, str):
150 # Disable latency if NIC does not support requested stream type
151 print(u"##### FAILED to add latency streams #####")
154 if traffic_directions > 1:
158 # Clear the stats before injecting:
161 # Choose rate and start traffic:
162 time_start = time.time()
163 client.start(ports=ports, mult=rate, duration=warmup_time)
166 client.wait_on_traffic(ports=ports, timeout=warmup_time+30)
167 time_stop = time.time()
168 print(f"Warmup traffic took {time_stop - time_start} seconds.")
170 if client.get_warnings():
171 for warning in client.get_warnings():
174 # Read the stats after the test:
175 stats = client.get_stats()
177 print(u"##### Warmup statistics #####")
178 print(json.dumps(stats, indent=4, separators=(u",", u": ")))
180 lost_a = stats[port_0][u"opackets"] - stats[port_1][u"ipackets"]
181 if traffic_directions > 1:
182 lost_b = stats[port_1][u"opackets"] - stats[port_0][u"ipackets"]
184 print(f"\npackets lost from {port_0} --> {port_1}: {lost_a} pkts")
185 if traffic_directions > 1:
186 print(f"packets lost from {port_1} --> {port_0}: {lost_b} pkts")
188 # Clear the stats before injecting:
193 # Choose rate and start traffic:
194 time_start = time.time()
195 client.start(ports=ports, mult=rate, duration=duration)
198 # For async stop, we need to export the current snapshot.
199 xsnap0 = client.ports[0].get_xstats().reference_stats
200 print(f"Xstats snapshot 0: {xsnap0!r}")
201 if traffic_directions > 1:
202 xsnap1 = client.ports[1].get_xstats().reference_stats
203 print(f"Xstats snapshot 1: {xsnap1!r}")
206 client.wait_on_traffic(ports=ports, timeout=duration+30)
207 time_stop = time.time()
208 print(f"Main traffic took {time_stop - time_start} seconds.")
210 if client.get_warnings():
211 for warning in client.get_warnings():
214 # Read the stats after the test
215 stats = client.get_stats()
217 print(u"##### Statistics #####")
218 print(json.dumps(stats, indent=4, separators=(u",", u": ")))
220 lost_a = stats[port_0][u"opackets"] - stats[port_1][u"ipackets"]
221 if traffic_directions > 1:
222 lost_b = stats[port_1][u"opackets"] - stats[port_0][u"ipackets"]
224 # Stats index is not a port number, but "pgid".
225 # TODO: Find out what "pgid" means.
227 lat_obj = stats[u"latency"][0][u"latency"]
229 str(lat_obj[u"total_min"]), str(lat_obj[u"average"]),
230 str(lat_obj[u"total_max"]), str(lat_obj[u"hdrh"]))
231 if traffic_directions > 1:
232 lat_obj = stats[u"latency"][1][u"latency"]
234 str(lat_obj[u"total_min"]), str(lat_obj[u"average"]),
235 str(lat_obj[u"total_max"]), str(lat_obj[u"hdrh"]))
237 if traffic_directions > 1:
238 total_sent = stats[0][u"opackets"] + stats[1][u"opackets"]
239 total_rcvd = stats[0][u"ipackets"] + stats[1][u"ipackets"]
241 total_sent = stats[port_0][u"opackets"]
242 total_rcvd = stats[port_1][u"ipackets"]
244 print(f"\npackets lost from {port_0} --> {port_1}: {lost_a} pkts")
245 if traffic_directions > 1:
246 print(f"packets lost from {port_1} --> {port_0}: {lost_b} pkts")
248 except STLError as ex_error:
249 print(ex_error, file=sys.stderr)
255 client.disconnect(stop_traffic=False, release_ports=True)
260 f"rate={rate!r}, totalReceived={total_rcvd}, "
261 f"totalSent={total_sent}, frameLoss={lost_a + lost_b}, "
262 f"latencyStream0(usec)={lat_a}, latencyStream1(usec)={lat_b}, "
263 f"targetDuration={duration!r}"
268 """Main function for the traffic generator using T-rex.
270 It verifies the given command line arguments and runs "simple_burst"
273 parser = argparse.ArgumentParser()
275 u"-p", u"--profile", required=True, type=str,
276 help=u"Python traffic profile."
279 u"-d", u"--duration", required=True, type=float,
280 help=u"Duration of traffic run."
283 u"-s", u"--frame_size", required=True,
284 help=u"Size of a Frame without padding and IPG."
287 u"-r", u"--rate", required=True,
288 help=u"Traffic rate with included units (%, pps)."
291 u"-w", u"--warmup_time", type=float, default=5.0,
292 help=u"Traffic warm-up time in seconds, 0 = disable."
295 u"--port_0", required=True, type=int,
296 help=u"Port 0 on the traffic generator."
299 u"--port_1", required=True, type=int,
300 help=u"Port 1 on the traffic generator."
303 u"--async_start", action=u"store_true", default=False,
304 help=u"Non-blocking call of the script."
307 u"--latency", action=u"store_true", default=False,
308 help=u"Add latency stream."
311 u"--traffic_directions", type=int, default=2,
312 help=u"Send bi- (2) or uni- (1) directional traffic."
315 args = parser.parse_args()
318 framesize = int(args.frame_size)
320 framesize = args.frame_size
323 profile_file=args.profile, duration=args.duration, framesize=framesize,
324 rate=args.rate, warmup_time=args.warmup_time, port_0=args.port_0,
325 port_1=args.port_1, latency=args.latency, async_start=args.async_start,
326 traffic_directions=args.traffic_directions
330 if __name__ == u"__main__":